2017年4月
Isotopic Shift of Atom-Dimer Efimov Resonances in K-Rb Mixtures: Critical Effect of Multichannel Feshbach Physics
PHYSICAL REVIEW LETTERS
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- 巻
- 118
- 号
- 16
- 開始ページ
- 163401
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.118.163401
- 出版者・発行元
- AMER PHYSICAL SOC
Multichannel Efimov physics is investigated in ultracold heteronuclear admixtures of K and Rb atoms. We observe a shift in the scattering length where the first atom-dimer resonance appears in the K-41-Rb-87 system relative to the position of the previously observed atom-dimer resonance in the K-40-Rb-87 system. This shift is well explained by our calculations with a three-body model including van der Waals interactions, and, more importantly, multichannel spinor physics. With only minor differences in the atomic masses of the admixtures, the shift in the atom-dimer resonance positions can be cleanly ascribed to the isolated and overlapping Feshbach resonances in the K-40-Rb-87 and K-41-Rb-87 systems, respectively. Our study demonstrates the role of multichannel Feshbach physics in determining Efimov resonances in heteronuclear three-body systems.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevLett.118.163401
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000399816500010